Abstract

2-Phenyl-4H-benzo[dJ[1,3]oxazin-4-one(I)was prepared by the reaction of anthranilic acid with benzoyl chlonide in pyridine solution. Heating of (I) with carbamide resulted in 4-oxo-2-phenyl-quinzolin-3-(4H).carboxamide(II) which on reaction with amido/imido-alcanols afforded N-[(amido/imido-2-yl)alkyl]-4-oxo-1-phenyl-quinazolin-3(4H)-carboxamides(III) as target compounds in moderate yields.